Broke Saint m820 caliper on a fakie gap.(After 2 years bashing them). Though I don't go BIG, so I can understand why pros would avoid them.
Broke Magura levers aswell (few rides) learning nose stuff. Yes, good customer service. Got it replaced. But I would prefer a stronger lever. I can't trust them anymore.
As a basher, I can tell those saint m820 levers are very strong and I still have mines since almost 4 years. (One lost spring pretty early)
So I tried Shimagura. Saint M820 lever on mt4 caliper. It's been 7 months without any issue. It has great power and sweet modulation. No leaks. No air bubbles. Works perfect to me.